crypto: octeontx2 - enable SR-IOV and mailbox communication with VF

Adds 'sriov_configure' to enable/disable virtual functions (VFs).
Also Initializes VF<=>PF mailbox IRQs, register handlers for
processing these mailbox messages.

Admin function (AF) handles resource allocation and configuration for
PFs and their VFs. PFs request the AF directly, via mailboxes.
Unlike PFs, VFs cannot send a mailbox request directly. A VF sends
mailbox messages to its parent PF, with which it shares a mailbox
region. The PF then forwards these messages to the AF. After handling
the request, the AF sends a response back to the VF, through the PF.

This patch adds support for this 'VF <=> PF <=> AF' mailbox
communication.

Signed-off-by: Suheil Chandran <schandran@marvell.com>
Signed-off-by: Lukasz Bartosik <lbartosik@marvell.com>
Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Author: SruChalla

drivers/crypto/marvell/octeontx2/otx2_cpt_common.h

@@ -14,6 +14,7 @@
 #include "rvu.h"
 #include "mbox.h"
 
+#define OTX2_CPT_MAX_VFS_NUM 128
 #define OTX2_CPT_RVU_FUNC_ADDR_S(blk, slot, offs) \
 		(((blk) << 20) | ((slot) << 12) | (offs))
 

drivers/crypto/marvell/octeontx2/otx2_cptpf.h

@@ -7,19 +7,46 @@
 
 #include "otx2_cpt_common.h"
 
+struct otx2_cptpf_dev;
+struct otx2_cptvf_info {
+	struct otx2_cptpf_dev *cptpf;	/* PF pointer this VF belongs to */
+	struct work_struct vfpf_mbox_work;
+	struct pci_dev *vf_dev;
+	int vf_id;
+	int intr_idx;
+};
+
+struct cptpf_flr_work {
+	struct work_struct work;
+	struct otx2_cptpf_dev *pf;
+};
+
 struct otx2_cptpf_dev {
 	void __iomem *reg_base;		/* CPT PF registers start address */
 	void __iomem *afpf_mbox_base;	/* PF-AF mbox start address */
+	void __iomem *vfpf_mbox_base;   /* VF-PF mbox start address */
 	struct pci_dev *pdev;		/* PCI device handle */
+	struct otx2_cptvf_info vf[OTX2_CPT_MAX_VFS_NUM];
 	/* AF <=> PF mbox */
 	struct otx2_mbox	afpf_mbox;
 	struct work_struct	afpf_mbox_work;
 	struct workqueue_struct *afpf_mbox_wq;
 
+	/* VF <=> PF mbox */
+	struct otx2_mbox	vfpf_mbox;
+	struct workqueue_struct *vfpf_mbox_wq;
+
+	struct workqueue_struct	*flr_wq;
+	struct cptpf_flr_work   *flr_work;
+
 	u8 pf_id;               /* RVU PF number */
+	u8 max_vfs;		/* Maximum number of VFs supported by CPT */
+	u8 enabled_vfs;		/* Number of enabled VFs */
 };
 
 irqreturn_t otx2_cptpf_afpf_mbox_intr(int irq, void *arg);
 void otx2_cptpf_afpf_mbox_handler(struct work_struct *work);
+irqreturn_t otx2_cptpf_vfpf_mbox_intr(int irq, void *arg);
+void otx2_cptpf_vfpf_mbox_handler(struct work_struct *work);
 
 #endif /* __OTX2_CPTPF_H */